<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in ShopcartList" :key="cart.skuId">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked"
              @click="changeChecked(cart)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="changeNum('dec', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              minnum="1"
              @change="changeNum('update', $event.target.value * 1, cart)"
              class="itxt"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="changeNum('inc', 1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCart(cart.skuId)">删除</a>
            <br />
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="checkedAll" />
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteChecked">删除选中的商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ chooseNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ titalPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
  name: 'ShopCart',
  mounted() {
    this.getShopcartList()
  },
  methods: {
    getShopcartList() {
      this.$store.dispatch('getShopcartList')
    },
    async changeNum(flag, disNum, cart) {
      if (flag === 'inc') {
        disNum
      } else if (flag === 'dec') {
        disNum = cart.skuNum == 1 ? 0 : -1
      } else {
        console.log(flag, disNum, cart, cart.skuNum)
        let a = disNum < 1 ? 0 : disNum - cart.skuNum * 1
        disNum = a
      }

      try {
        await this.$store.dispatch('getAddOrUpdateCart', {
          skuId: cart.skuId,
          skuNum: disNum,
        })
        this.getShopcartList()
      } catch (error) {
        alert('修改失败')
      }
    },

    // 修改isChecked
    async changeChecked(cart) {
      // this.ShopcartList[index].isChecked = !this.ShopcartList[index].isChecked
      try {
        await this.$store.dispatch('getChangeChecked', {
          skuId: cart.skuId,
          isChecked: cart.isChecked ? 0 : 1,
        })
        this.getShopcartList()
      } catch (error) {
        alert('修改选中框失败')
      }
    },
    // 删除cart
    async deleteCart(id) {
      // this.ShopcartList.splice(index, 1)
      try {
        await this.$store.dispatch('reqDeleteShopCart', id)
        this.getShopcartList()
      } catch (error) {
        alert('删除失败')
      }
    },
    // 改变所有选择框
    // changeAll() {
    // let flag = this.ShopcartList.every((item) => item.isChecked)
    // if (flag) {
    //   this.ShopcartList.forEach((attr) => {
    //     attr.isChecked = false
    //   })
    // } else {
    //   this.ShopcartList.forEach((attr) => {
    //     attr.isChecked = true
    //   })
    // }
    // },
    // deleteChecked() {
    //   let newArr = this.ShopcartList.filter((item) => {
    //     return item.isChecked == false
    //   })
    //   this.ShopcartList = newArr
    // },
    async deleteChecked() {
      let skuIdList = []
      this.ShopcartList?.forEach((item) => {
        if (item.isChecked) {
          skuIdList.push(item.skuId)
        }
      })
      try {
        await this.$store.dispatch('reqDeleteAllCart', skuIdList)
        this.getShopcartList()
      } catch (error) {
        alert('删除已选择失败')
      }
    },
  },
  computed: {
    ...mapState({
      ShopcartList: (state) => state.shopcart.ShopcartList,
    }),
    // 已选择数量
    chooseNum() {
      let num = 0
      this.ShopcartList?.forEach((item) => {
        if (item.isChecked) {
          num += item.skuNum
        }
      })
      return num
    },
    // 总价
    titalPrice() {
      let prev = 0
      this.ShopcartList?.forEach((cart) => {
        if (cart.isChecked) {
          prev += cart.skuNum * cart.skuPrice
        }
      })
      return prev
    },
    // checkedAll() {
    //   return this.ShopcartList.every((item) => item.isChecked)
    // },
    checkedAll: {
      get() {
        return this.ShopcartList?.every((item) => item.isChecked)
      },
      async set(newVal) {
        let skuIdList = []
        this.ShopcartList.forEach((item) => {
          if (item.isChecked != newVal) {
            skuIdList.push(item.skuId)
          }
        })
        try {
          await this.$store.dispatch('changeAllChecked', {
            isChecked: newVal ? 1 : 0,
            skuIdList,
          })
          this.getShopcartList()
        } catch (error) {
          alert('修改全选框失败')
        }
      },
    },
  },
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }
        .cart-list-con5 {
          width: 17%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
            text-decoration: none;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 31px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
            text-decoration: none;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
          text-decoration: none;
          &hover {
            color: white !important;
          }
        }
      }
    }
  }
}
</style>
